I'll be using a Saito 1.50 and yours is the YS 1.40, and these engines weigh within an ounce of each other. (I know the YS is stronger but should be close for the type of flying I will be doing). What size and type of servos did you use, and how far from the rudder post were they mounted? How much did the plane wiegh (dry)? Hope you don't mind the questions.
Thanks,
Cajuncharley